Hi cWX611640, thanks for the help,
The (s,g) appears as (*,g), I didn't configure the ssm mapping. Yesterday I've done some testes and I discovered that it works with any group from 224.0.1.1 to 224.127.255.255. The same is true to all other groups from 224 to 239.
If I use, for example, 239.127.1.1 it works, but if I use 239.255.1.1, beside the MAC address is the same (01-00-5e-7f-01-01), it doesn't work.
I'm not sure, but it seams to bee related with multicast-hash-mode.
Next week I'll do some testes with that.